Patents by Inventor Li-Cheng Jheng
Li-Cheng Jheng has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 9963533Abstract: A copolymer is provided, which includes a chemical structure of: R is C1-6 alkylene group. T is a terminal group including C1-6 alkyl group, C3-6 cycloalkyl group, or C6-12 aromatic group. l is 0.05 to 0.3, m is 0.1 to 0.2, n is 0.5 to 0.8, l+m+n=1, x is 40 to 100, and o is 10 to 120. An epoxy resin composite is also provided, which includes 100 parts by weight of epoxy resin and 1 to 20 parts by weight of toughness enhancer such as the above copolymer.Type: GrantFiled: December 22, 2015Date of Patent: May 8, 2018Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chien-Pang Wu, Li-Cheng Jheng, Chia-Hao Li, Jyh-Horng Wu, Hsi-Hsin Shih
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Patent number: 9705146Abstract: A method is provided to fabricate an electrolyte membrane. The membrane has an asymmetric structure and is a polybenzimidazole membrane doped with phosphoric acid. The asymmetric structure comprises a dense layer and a porous layer. The content of phosphoric acid introduced into the polybenzimidazole membrane reaches 20 phosphoric acid molecules per polymer repeating unit. The proton conductivity of the polybenzimidazole membrane reaches 5×10?2 siemens per centimeter (S/cm). An electrode made with the polybenzimidazole membrane can be smoothly operated in a proton exchange membrane fuel cell.Type: GrantFiled: December 29, 2014Date of Patent: July 11, 2017Assignee: NATIONAL CHENG KUNG UNIVERSITYInventors: Steve Lien-Chung Hsu, Li-cheng Jheng
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Publication number: 20170145134Abstract: A copolymer is provided, which includes a chemical structure of: R is C1-6 alkylene group. T is a terminal group including C1-6 alkyl group, C3-6 cycloalkyl group, or C6-12 aromatic group. l is 0.05 to 0.3, m is 0.1 to 0.2, n is 0.5 to 0.8, l+m+n=1, x is 40 to 100, and o is 10 to 120. An epoxy resin composite is also provided, which includes 100 parts by weight of epoxy resin and 1 to 20 parts by weight of toughness enhancer such as the above copolymer.Type: ApplicationFiled: December 22, 2015Publication date: May 25, 2017Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Chien-Pang WU, Li-Cheng JHENG, Chia-Hao LI, Jyh-Horng WU, Hsi-Hsin SHIH
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Publication number: 20160190625Abstract: A method is provided to fabricate an electrolyte membrane. The membrane has an asymmetric structure and is a polybenzimidazole membrane doped with phosphoric acid. The asymmetric structure comprises a dense layer and a porous layer. The content of phosphoric acid introduced into the polybenzimidazole membrane reaches 20 phosphoric acid molecules per polymer repeating unit. The proton conductivity of the polybenzimidazole membrane reaches 5×10?2 siemens per centimeter (S/cm). An electrode made with the polybenzimidazole membrane can be smoothly operated in a proton exchange membrane fuel cell.Type: ApplicationFiled: December 29, 2014Publication date: June 30, 2016Inventors: Steve Lien-Chung Hsu, Li-cheng Jheng
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Patent number: 9181418Abstract: Disclosed is a method for treating a surface of a PVC product. A PVC product including PVC and plasticizer is provided. A surface of the PVC product is treated by an aqueous solution of a crosslinking agent and a first phase transfer catalyst to form a first surface treated PVC product. The surface of the first surface treated PVC product is treated by an aqueous solution of an aqueous free radical initiator and a second phase transfer catalyst to form a second surface treated PVC product. As such, the release of the plasticizer from the PVC product to an environment is inhibited.Type: GrantFiled: December 27, 2012Date of Patent: November 10, 2015Assignee: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Li-Cheng Jheng, Cheng-Wei Yeh, Kuo-Chen Shih
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Patent number: 8772419Abstract: Disclosed is a method for manufacturing a polyester film with low thermal expansion. 95 wt % to 55 wt % of crystalline polyester and 5 wt % to 45 wt % of amorphous polyester are mixed. The blend is then melt extruded to form a sheet. The sheet is then biaxially stretched to obtain a film. The biaxially stretched film is then treated with a heat-setting procedure.Type: GrantFiled: June 12, 2012Date of Patent: July 8, 2014Assignee: Industrial Technology Research InstituteInventors: Li-Cheng Jheng, Jrjeng Ruan, Ming-Tsong Leu, Kuo-Chen Shih, Jyh-Horng Wu, Cheng-Hsing Fan
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Publication number: 20140148539Abstract: Disclosed is a method for treating a surface of a PVC product. A PVC product including PVC and plasticizer is provided. A surface of the PVC product is treated by an aqueous solution of a crosslinking agent and a first phase transfer catalyst to form a first surface treated PVC product. The surface of the first surface treated PVC product is treated by an aqueous solution of an aqueous free radical initiator and a second phase transfer catalyst to form a second surface treated PVC product. As such, the release of the plasticizer from the PVC product to an environment is inhibited.Type: ApplicationFiled: December 27, 2012Publication date: May 29, 2014Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Li-Cheng JHENG, Cheng-Wei YEH, Kuo-Chen SHIH
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Patent number: 8735484Abstract: Disclosed is an amorphous copolyester polymerized of a diacid and diols. The diacid is selected from a group consisting of terephthalic acid, 5-tert-butylisophthalic acid, and dimethyl 2,6-naphthalenedicarboxylate. The diols are selected at least two from a group consisting of ethylene glycol, 2,2-dimethyl-1,3-propanediol, and tricyclodecanedimethanol. The molar ratio of the tricyclodecanedimethanol is 30% to 95% of the diols.Type: GrantFiled: December 27, 2012Date of Patent: May 27, 2014Assignee: Industrial Technology Research InstituteInventors: Cheng-Hsing Fan, Kuo-Chen Shih, Ming-Tsong Leu, Li-Cheng Jheng
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Publication number: 20140142247Abstract: Disclosed is an amorphous copolyester polymerized of a diacid and diols. The diacid is selected from a group consisting of terephthalic acid, 5-tert-butylisophthalic acid, and dimethyl 2,6-naphthalenedicarboxylate. The diols are selected at least two from a group consisting of ethylene glycol, 2,2-dimethyl-1,3-propanediol, and tricyclodecanedimethanol. The molar ratio of the tricyclodecanedimethanol is 30% to 95% of the diols.Type: ApplicationFiled: December 27, 2012Publication date: May 22, 2014Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Cheng-Hsing FAN, Kuo-Chen SHIH, Ming-Tsong LEU, Li-Cheng JHENG
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Patent number: 8661917Abstract: A method for manufacturing a piezoresistive material, a piezoresistive composition and a pressure sensor device are provided. The piezoresistive composition includes a conductive carbon material, a solvent, a dispersive agent, an unsaturated polyester and a crosslinking agent. The conductive carbon material is selected from a group consisting of multi-wall nanotube, single-wall carbon nanotube, carbon nanocapsule, graphene, graphite nanoflake, carbon black, and a combination thereof. The solvent is selected from a group consisting of ethyl acetate, butyl acetate, hexane, propylene glycol mono-methyl ether acetate and a combination thereof. The dispersive agent includes block polymer solution with functional groups providing the affinity. The unsaturated polyester is selected from a group consisting of an ortho-phthalic type unsaturated polyester, an iso-phthalic type unsaturated polyester, and a combination thereof.Type: GrantFiled: October 14, 2011Date of Patent: March 4, 2014Assignee: Industrial Technology Research InstituteInventors: Li-Cheng Jheng, Wen-Yang Chang, Kuo-Chen Shih, Yi-Lun Hsu
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Publication number: 20130150532Abstract: Disclosed is a method for manufacturing a polyester film with low thermal expansion. 95 wt % to 55 wt % of crystalline polyester and 5 wt % to 45 wt % of amorphous polyester are mixed. The blend is then melt extruded to form a sheet. The sheet is then biaxially stretched to obtain a film. The biaxially stretched film is then treated with a heat-setting procedure.Type: ApplicationFiled: June 12, 2012Publication date: June 13, 2013Inventors: Li-Cheng JHENG, Jrjeng Ruan, Ming-Tsong Leu, Kuo-Chen Shih, Jyh-Horng Wu, Cheng-Hsing Fan
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Publication number: 20120090408Abstract: A method for manufacturing a piezoresistive material, a piezoresistive composition and a pressure sensor device are provided. The piezoresistive composition includes a conductive carbon material, a solvent, a dispersive agent, an unsaturated polyester and a crosslinking agent. The conductive carbon material is selected from a group consisting of multi-wall nanotube, single-wall carbon nanotube, carbon nanocapsule, graphene, graphite nanoflake, carbon black, and a combination thereof. The solvent is selected from a group consisting of ethyl acetate, butyl acetate, hexane, propylene glycol mono-methyl ether acetate and a combination thereof. The dispersive agent includes block polymer solution with functional groups providing the affinity. The unsaturated polyester is selected from a group consisting of an ortho-phthalic type unsaturated polyester, an iso-phthalic type unsaturated polyester, and a combination thereof.Type: ApplicationFiled: October 14, 2011Publication date: April 19, 2012Applicant: INDUSTRIAL TECHNOLOGY RESEARCH INSTITUTEInventors: Li-Cheng Jheng, Wen-Yang Chang, Kuo-Chen Shih, Yi-Lun Hsu